70223813 has 4 divisors (see below), whose sum is σ = 76607808. Its totient is φ = 63839820.

The previous prime is 70223801. The next prime is 70223827. The reversal of 70223813 is 31832207.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 70223813 - 2²⁶ = 3114949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70223833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3191981 + ... + 3192002.

It is an arithmetic number, because the mean of its divisors is an integer number (19151952).

Almost surely, 2^70223813 is an apocalyptic number.

It is an amenable number.

70223813 is a deficient number, since it is larger than the sum of its proper divisors (6383995).

70223813 is a wasteful number, since it uses less digits than its factorization.

70223813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6383994.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 70223813 is about 8379.9649760605. The cubic root of 70223813 is about 412.5672994572.

The spelling of 70223813 in words is "seventy million, two hundred twenty-three thousand, eight hundred thirteen".